The incident took place at around 6.45pm on Wednesday, July 14, after the teenager entered the park with a group of friends.
A group of five older teenagers assaulted him and stole some of his clothing and jewellery. He suffered minor injuries in the attack.
The suspects ran off and the police were then called.
All five of them were white and spoke with Glasgow accents. The first was described to be very pale and around 16-years-old. He was roughly 5ft 6in tall, slim built and had brown hair, he was wearing a black t-shirt and dark jogging bottoms and was riding a black bike.
The second suspect was again described to be very pale, but was roughly 17-years-old and carried a black rucksack. He was wearing a light brown skip cap, a black jacket and black jogging bottoms.
The third man was around 18-years-old, 6ft tall and of large build. He was wearing a grey hooded top with a black hood and black sleeves, bright blue jogging bottoms and a disposable blue face mask. He was riding a bright green bike.
The fourth person was roughly 19-years-old, heavy build and 5ft 11in tall. He had ginger facial hair or a short beard. He was wearing a black tracksuit and skinny jogging bottoms.
The final man was described to be about 20-years-old, he was 5ft 8in tall and of medium build. He was wearing navy jogging bottoms and a navy skip cap.
Detective Constable Natalie Timothy, Greater Glasgow Community Investigation Unit, Govan, said: "The park was busy at the time and I know that a number of people will have witnessed the attack.
"If you have any information that you think may assist our investigation, then please contact Police Scotland via 101.”
You should quote reference number 3057 of July 14 when calling the police to report any information. Alternatively, if you have information to share but would like to remain anonymous you can call Crimestoppers on 0800 555 111.